The main aspects are as follows:1. Derivate the resonance frequency equation according to the electro-mechanicalequivalent circuit of sandwich transducer.
主要工作如下：1、根据夹心式换能器的机电等效电路图，推导了换能器的整体频率方程。
2
To make a mechanical mind, you need to make the equivalent of a mechanical thumb — a lateral approach that few appreciate.
要想形成机械思维，你需要制作一只机械“拇指”——这是很少有人欣赏的迂回前进的方式。
3
James Joules The physicist James Joules, after we we call after him the unit of work was the first to demonstrate that heat energy and mechanical energy are really equivalent.